Ann Arbor (MI)
September
Weather in Ann Arbor, Michigan for September 2026
Your guide to Ann Arbor weather in September - trends and predictions
In general, the average temperature in Ann Arbor at the beginning of September is 21 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 23 °F by the end of September.
Ann Arbor experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 107 mm.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
24°/12°
Temperatures
17 km/h
Avg max wind
75 %
Avg humidity
Ann Arbor Weather September
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Temperatures trend during September in Ann Arbor
See the weather trend as well as the moving average line
September weather in Ann Arbor day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Mist | 24° /12° | 0 mm | 5 | |
| Sept. 2 |  Sunny | 26° /13° | 0 mm | 7 | |
| Sept. 3 |  Cloudy | 25° /12° | 2.2 mm | 6 | |
| Sept. 4 |  Overcast | 17° /11° | 33.6 mm | 4 | |
| Sept. 5 | Overcast | 19° /7° | 0 mm | 4 | |
| Sept. 6 | Overcast | 17° /7° | 0 mm | 4 | |
| Sept. 7 | Overcast | 19° /8° | 0 mm | 4 | |
| Sept. 8 | Sunny | 22° /6° | 0 mm | 6 | |
| Sept. 9 | Fog | 23° /6° | 0 mm | 5 | |
| Sept. 10 | Overcast | 22° /12° | 0 mm | 5 | |
| Sept. 11 | Cloudy | 27° /15° | 0 mm | 6 | |
| Sept. 12 | Overcast | 27° /13° | 0 mm | 6 | |
| Sept. 13 | Mist | 25° /10° | 0 mm | 6 | |
| Sept. 14 | Fog | 28° /13° | 0 mm | 6 | |
| Sept. 15 | Fog | 28° /13° | 0 mm | 6 | |
| Sept. 16 | Mist | 27° /14° | 0 mm | 6 | |
| Sept. 17 | Mist | 25° /14° | 0 mm | 6 | |
| Sept. 18 | Fog | 30° /10° | 0 mm | 7 | |
| Sept. 19 | Fog | 22° /16° | 0 mm | 5 | |
| Sept. 20 |  Partly cloudy | 26° /14° | 0 mm | 7 | |
| Sept. 21 |  Moderate or heavy rain shower | 23° /16° | 48.4 mm | 5 | |
| Sept. 22 |  Light rain | 26° /18° | 6.4 mm | 6 | |
| Sept. 23 | Mist | 24° /18° | 0 mm | 5 | |
| Sept. 24 | Fog | 21° /16° | 5.7 mm | 5 | |
| Sept. 25 |  Light rain shower | 19° /15° | 10.7 mm | 4 | |
| Sept. 26 | Fog | 22° /10° | 0 mm | 5 | |
| Sept. 27 | Overcast | 27° /15° | 0 mm | 6 | |
| Sept. 28 | Sunny | 24° /15° | 0 mm | 6 | |
| Sept. 29 | Sunny | 25° /11° | 0 mm | 7 | |
| Sept. 30 | Partly cloudy | 23° /12° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Ann Arbor in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Ann Arbor forecast closer to your planned date for the most up-to-date weather information.
Change Month
Ann Arbor in September - FAQ
What are the expected maximum and minimum temperatures in Ann Arbor during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Ann Arbor during September?
Significant rainfall exceeding 107 mm is expected in Ann Arbor during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Ann Arbor during September?
The average wind speed in Ann Arbor during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Ann Arbor
Explore the daily rainfall trends and prepare for Ann Arbors September weather 💧
Typically, Ann Arbor has 6 rainy days in September with a total of 107 mm of rainfall.
UV exposure in Ann Arbor during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Ann Arbor?Get accurate weather forecasts for Ann Arbor, located at latitude 42.278 and longitude -83.741. Stay updated with localized weather information tailored for Ann Arbor.
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